. 2013 Jul;195(13):3000–3008. doi: 10.1128/JB.02264-12

Table 2.

Substrate processivity and masses of MobM protein and its truncated versions

Protein	No. of residues^a	Calculated mass^b (Da)	Measured mass^c (Da)	Activity on DNA
Protein	No. of residues^a	Calculated mass^b (Da)	Measured mass^c (Da)	Supercoiled	Single stranded
MobM	493	57,692.3	ND	Yes	Yes
MobMN199	198	23,115.2	23,195.3^d	Yes	No
MobMN243	242	28,393.6	28,409.7^e	Yes	Yes

Number of total amino acid residues, excluding Met1, which is processed in the expression systems used in this study.

Monoisotopic, excluding Met1 (see footnote a).

Masses as determined by ESI-MS (see the text).

Mass corresponds to MobMN199 with one phosphorylated residue.

Mass corresponds to MobMN243 oxidized at one position.